centos 安装MySQL5.7

一、配置yum源

1、下载yum源 wget http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm
2、安装 yum localinstall mysql57-community-release-el7-8.noarch.rpm

3、检查是否安装成功 yum repolist enabled | grep "mysql.*-community.*"

二、安装MySQL

1、安装 yum install mysql-community-server

2、启动MySQL服务 systemctl start mysqld

3、查看是否启动成功 systemctl status mysqld

三、MySQL相关设置

1、默认密码不再是空，安装时会随机在/var/log/mysqld.log文件生成一个密码，查看临时密码：

grep 'temporary password' /var/log/mysqld.log,



2、登录后修改密码：set password for 'root'@'localhost'=password('MyNewPass4!');（注意：密码必须包含大小写字母、数字和特殊符号，并且长度不能少于8位）

3 、设置远程连接（不是会报Host ‘XXX’ is not allowed to connect to this MySQL server错误）

mysql>use mysql;

mysql>update user set host ='%'where user ='root' and host ='localhost';

mysql>GRANT ALL PRIVILEGES ON *.* TO '（用户名）'@'%' IDENTIFIED BY '（密码）' WITH GRANT OPTION;

mysql>flush privileges;